CA1330921C - Movable index sheet unit - Google Patents

Abstract

Abstract A movable index mounted on a base sheet for reciprocal movement which movement is controlled, guided and limited by track means and track-follower means.

Description

~` 1 330921 MOVABLE INDEX SHEET UNIT

Backqround of the Invention :

Movable information sheet display arrangements are old (U.S. Patent Nos. 694,001, 854,069, 2,291,573 and ~ ~:

2,452,231). In addition, information displays movable from a .~' concealed position to a display position are old (See U.S.
Patent No. 694,001). Prior housing arrangements for containing index means and the track arrangements for controlling and limiting such index movement have not been -found to be satisfactory.

Summary of the Invention Broadly, the present invention comprises a stationary base sheet having spaced-apart track~means ~-comprising deflectable projection tabs and a reciprocating ~ index sheet positionable on the base sheet for movement back ;~ and forth thereon such index sheet having spaced-apart track follower means comprising slots for receiving the base sheet projections so that the projections guide the reciprocal 20 index sheet and function as stops to limit such ~ :
reciprocation.

It is a feature that the base sheet is covered with a cover sheet which cover sheet together with the base sheet act as opposing guide sheets to house, guide and control the interleaved index sheet. The cover sheet also deflects and ~:~ holds deflectable pxojections in their deflected positions. ~;
, :, ~ ~ , It is also a feature that projections are formed as 30 partial cutouts of the base sheet. ;: ;

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' -2- ~ 330q21 Brief Descri tion of the Draw n~s Fig. 1 is a perspective view of the movabLe index -~
unit with the cover in a raised position ready for assembly;
and -~; Fig. 2 is an exploded perspective view of the unit ''-with the base sheet and cover in an open position.

Description of the Preferred Embodim~nt In Figs. 1 and 2, movable index unit 10 includes stationary base sheet 11 having top or inside planar surface ~ lla and bottom or outside planar surface llb (not shown) and `~ cover sheet 12 attached along fold line 13 and separate '~
movable index sheet 14. Sheet 11 also has forward edge llf 15 and rearward edge llr. Cover sheet 12 includes flap 16 '~'~
folded aIong fold line 17 when assembled and tucked into base sheet slot 18 entering from a direction toward surface llb (a portion of flap 16 appearing as dotted line 21; Fig. '~
2). Base sheet 11 and cover sheet 12' carry punch holes 22 20 for use with ring binders or other punched sheet holders. '~
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All portions of unit 10 are preferably made from paper, cardboard or plastic sheet stock.

Base sheet 11 has first and second spaced-apart track means comprising cutout flexible projection tabs 24, 26 which are insertable into track follower means comprising index elongated slots 15, 20 of index sheet 14. Elongated '~
slots 15, 20 which are cut all the way through sheet 14 have slot ends 15a, 15b and 20a, 20b. Base sheet 11 is ;'~' ~'' 30 rectangular with forward edge llf and 'rearward edge llr and index sheet has forward edge 14f and rearward edge 14r.
Projection tabs 24,`26 are bent over to lie flat as ~ ~
~ ~ illustrated by dotted line 27 of Fig. 1 or partially ~' ; ~ deflected in response to the positioning of cover 12 as -~
35 further explained. Index sheet 14 has index portion 31 with ' '~
index information printed or written on it such as "index", "1", "2" and `'3".

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- -` 1 3~0921 ~ :

,., . :- ., In assembly and operation of unit 10, index sheet 14 is placed on surface lla of base sheet 11 with projection -~
tabs 24, 26 threaded through elongated slots 15 and 20.
Cover sheet 12 is then folded down and flap 16 wrapped -around base sheet 11 and finally flap 16 is threaded through slot 18 from a direction toward surface llb to complete assembly. Projection tabs 24, 26 are caused to deflect and fold down to a horizontal position as shown by dotted lines 27 or some lesser deflected position. As so assembled, index sheet 14 is ready for reciprocation by sliding sheet 14 in direction of arrow A (Fig. 1). Elongated slots 15, 20 with slot ends 15a, lSb, 20a, 20b are of selected length and -position so that index sheet 14 is limited in movement by slot ends 15a, 15b, 20a, 20b engaging respective projection ~- -tabs 24, 26. Preferably, index sheet 14 reaches one limit ~ ~ ~
to its motion when nested fully within and between base -sheet 11 and cover sheet 12 wherein forward edges llf and 14f are adjacent. The other limit occurs when index portion -~
31 is extended sufficiently beyond base sheet 11 and cover sheet 12 for complete index viewing. Projection tabs 24 and 26 in their elongated slots 15, 20 prevent complete removal of index sheet 14 from unit 10.

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Claims (4)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A movable index sheet unit comprising a base sheet having a forward and a rear edge such base sheet having a first and second spaced-apart track means;

a movable index sheet with forward and rear edges having a track follower means including limit means to permit reciprocation of the index sheet within limits from an exposed position in which the index sheet edge is remote Prom the base sheet edge to a retracted position in such edges are adjacent;

the limit means and the track follower means being so positioned that the front edges of the base sheet and index sheet are substantially adjacent in the retracted position.

2. The index unit of claim 1 in which a cover sheet is placed over the base sheet with the index sheet interleaved.

3. The index unit of claim 2 in which the cover sheet is connected to the base sheet on one end by hinge means and connected at the other end by flap and slot means.

4. The index unit of claim 1 in which the base sheet and movable index are rectangular.